Emkhakheni wemishini yezimboni, ukuqinisekisa ubuqotho bemishini ye-rotary namaphampu kubaluleke kakhulu. Izigxivizo zemishini zisebenza njengezingxenye ezibalulekile ekugcineni lobu buqotho ngokuvimbela ukuvuza nokuqukatha uketshezi. Kulo mkhakha okhethekile, kukhona ukucushwa okubili okuyinhloko: okukodwa kanyekabili mechanical seals. Uhlobo ngalunye lunikeza izinzuzo ezihlukile futhi lubhekelela izidingo ezithile zokusebenza. Le ndatshana icubungula ama-nuances phakathi kwalezi zixazululo ezimbili zokubeka uphawu, ichaza ukusebenza kwazo, izinhlelo zokusebenza, kanye nezinzuzo.
YiniSingle Mechanical Seal?
Uphawu olulodwa olusetshenziswayo lunezingxenye ezimbili eziyinhloko—ezungezayo kanye neyodwaubuso bophawu obumile. Ubuso obujikelezayo bophawu bunamathiselwe kushafti ezungezayo kuyilapho ubuso obumile bulungiswa endaweni yepompo. Lobu buso obubili bududulwa ndawonye umshini wasentwasahlobo obuvumela ukuthi bakhe uphawu oluqinile oluvimbela uketshezi ukuthi lungavuzi eduze kwe-shaft.
Izinto ezibalulekile ezisetshenziselwa lezi zindawo zokuvala ziyahlukahluka, ngokukhethwa okuvamile okuyi-silicon carbide, i-tungsten carbide, i-ceramic, noma i-carbon, evame ukukhethwa ngokusekelwe ezicini zoketshezi lwenqubo kanye nezimo zokusebenza ezifana nezinga lokushisa, ingcindezi, nokuhambisana kwamakhemikhali. Ukwengeza, ifilimu yokugcoba yoketshezi olumpontshwayo ngokuvamile ihlala phakathi kobuso be-seal ukuze kuncishiswe ukuguga—isici esibalulekile ekugcineni impilo ende.
Izigxivizo zemishini eyodwa ngokuvamile zisetshenziswa lapho ubungozi bokuvuza bungabangeli ubungozi bokuphepha noma ukukhathazeka kwemvelo. Umklamo wabo olula uvumela ukufakwa kalula kanye nezindleko zokuqala eziphansi uma kuqhathaniswa nezixazululo eziyinkimbinkimbi zokufaka uphawu. Ukugcina lezi zimpawu kuhlanganisa ukuhlolwa njalo nokushintshwa ngezikhathi ezinqunywe kusengaphambili ukuze kuvinjelwe ukuwohloka okubangelwa ukuguga okuvamile.
Ezindaweni ezingadingi kakhulu izindlela zokuvala—lapho uketshezi olunamandla noma oluyingozi lungekho—izigxivizo zomshini owodwa zinikeza ukusebenza kahle.isixazululo sokuvala uphawuukufaka isandla emijikelezweni yokuphila yemishini ende ngenkathi igcina izinqubo zokunakekela ziqondile.
Incazelo Yesici
Izingxenye Eziyinhloko Ubuso bophawu oluzungezayo (ku-shaft), Ubuso bophawu olunganyakazi (kundlu yephampu)
Materials Silicon carbide, Tungsten carbide, Ceramic, Carbon
I-Mechanism Spring-egcwele ubuso obududuliwe ndawonye
Seal Interface Fluid ifilimu phakathi kobuso
Izicelo Ezivamile Uketshezi/izinqubo eziyingozi encane lapho ingozi ngenxa yokuvuza incane
Izinzuzo Design Simple; Ukufakwa kalula; Izindleko eziphansi
Izidingo Zokunakekela Ukuhlolwa okuvamile; Ukushintsha ngezikhathi ezithile
single spring mechanical seal e1705135534757
Iyini i-Double Mechanical Seal?
I-double mechanical seal iqukethe izigxivizo ezimbili ezihlelwe ngochungechunge, futhi ibizwa ngokuthi i-double cartridge mechanical seal. Lo mklamo unikeza ukuqukatha okuthuthukisiwe koketshezi oluvalwayo. Izigxivizo eziphindwe kabili zivame ukusetshenziswa ezinhlelweni lapho ukuvuza komkhiqizo kungaba yingozi endaweni ezungezile noma ukuphepha kwezisebenzi, lapho uketshezi lwenqubo lubiza futhi ludinga ukulondolozwa, noma lapho uketshezi okunzima ukuluphatha futhi lungacwebezela noma luqine lapho luthintana nezimo zomoya. .
Lezi zimpawu zemishini ngokuvamile ziba ne-inboard kanye ne-outboard seal. I-inboard seal igcina umkhiqizo ngaphakathi kwendlu yepompo ngenkathi uphawu olungaphandle lumi njengesithiyo esiyisipele sokuphepha nokuthembeka okwengeziwe. Ama-double seal ngokuvamile adinga uketshezi lwe-buffer phakathi kwawo, olusebenza njengesithambiso kanye nesibambisi ukunciphisa ukushisa kokungqubuzana - okunweba isikhathi sokuphila sazo zombili izimpawu.
Uketshezi lwebhafa lungaba nokucushwa okubili: okungacindezelwanga (okwaziwa ngokuthi uketshezi oluvimbelayo) noma okucindezelwe. Ezinhlelweni ezinengcindezi, uma uphawu lwangaphakathi luhluleka, akumele kube khona ukuvuza ngokushesha njengoba uphawu lwangaphandle luzobamba ukuthintana kuze kube yilapho kwenzeka ukulungiswa. Ukuqapha ngezikhathi ezithile kwalolu ketshezi oluvimbelayo kusiza ukubikezela ukusebenza kwe-seal nokuphila isikhathi eside.
Incazelo Yesici
Ukungqubuzana High-containment sokuvala isixazululo
Dizayina Izigxivizo ezimbili ezihlelwe ngochungechunge
Ukusetshenziswa kwezindawo eziyingozi; ukonga uketshezi olubizayo; ukuphatha uketshezi olunzima
Izinzuzo Ukuphepha okuthuthukisiwe; ukunciphisa amathuba okuvuza; kungenzeka inwebe isikhathi sempilo
Isidingo Soketshezi Lwesibhafa Ingafakwa umfutho (uketshezi oluvimbayo) noma icindezeleke
Ukuphepha Kuhlinzeka isikhathi sesenzo sokulungisa ngaphambi kokuba ukuvuza kwenzeke ngemva kokwehluleka
kabili mechanical seal 500×500 1
Izinhlobo zama-Double Mechanical Seals
ukucushwa kwezigxivizo zemishini ephindwe kabili kuklanyelwe ukuphatha izinselele zokuvala ezidingeka kakhulu kunezimpawu zomshini owodwa. Lokhu kulungiselelwa kufaka phakathi izinhlelo zokubuyela emuva, zobuso nobuso kanye ne-tandem, ngayinye inokusetha nokusebenza kwayo okuhlukile.
1.Buyela Emuva I-Double Mechanical Seal
I-back to back mechanical seal iqukethe izigxivizo ezimbili ezingazodwa ezihlelwe ngokuhlelwa okubuyela emuva. Lolu hlobo lophawu luklanyelwe izinhlelo zokusebenza ezithile lapho kusetshenziswa isistimu ye-barrier fluid phakathi kwezimpawu ukuze kuhlinzekwe ukugcotshwa nokususa noma yikuphi ukushisa okukhiqizwa ngenxa yokungqubuzana.
Ekuhlelweni kwe-back to back, inboard seal isebenza ngaphansi kwezimo zengcindezi efanayo njengoba umkhiqizo uvalwa, kuyilapho umthombo wangaphandle unikeza uphawu lwangaphandle ngoketshezi oluvimbelayo ngokucindezela okukhulu. Lokhu kuqinisekisa ukuthi kuhlale kunengcindezi enhle kubo bobabili ubuso bezimpawu; kanjalo, ukuvimbela uketshezi lwenqubo ukuthi lungangeni endaweni ezungezile.
Ukusetshenziswa komklamo we-back to back seal kungazuzisa izinhlelo lapho izingcindezi ezihlehlayo zikhathaza khona noma lapho ukugcinwa kwefilimu yokugcoba njalo kubalulekile ukuze kugwenywe izimo zokusebenza ezomile. Zifaneleka ngokukhethekile ekusetshenzisweni kokucindezela okuphezulu, ukuqinisekisa ukuthembeka nokuphila isikhathi eside kwesistimu yokuvala uphawu. Ngenxa yedizayini yabo eqinile, baphinde banikeze ukuvikeleka okwengeziwe ngokumelene nokuguqulwa kwengcindezi yesistimu okungalindelekile okungase kuphazamise ubuqotho bomshini owodwa wophawu.
I-face to face mechanical seal arrangement, eyaziwa nangokuthi i-tandem seal, idizayinelwe inobuso obubili obuphikisanayo obubekwe ngendlela yokuthi izigxivizo zangaphakathi nezangaphandle zithintane ngobuso bazo obuyisicaba. Lolu hlobo lwesistimu yophawu luzuzisa kakhulu lapho uphatha izinhlelo zokusebenza zengcindezi ephakathi nendawo lapho uketshezi oluphakathi kwezivalo ludinga ukulawulwa futhi lungaba yingozi kakhulu uma luvuzayo.
Enye yezinzuzo ezibaluleke kakhulu zokusebenzisa ubuso ukuze ubhekane ne-double mechanical seal yikhono layo lokuvimbela uketshezi olucutshungulwayo ukuthi lungangeni endaweni ezungezile. Ngokwakha umgoqo one-bafa noma uketshezi oluvimbelayo phakathi kwezimpawu ezimbili ezinobuso obuyisicaba ngaphansi kwengcindezi ephansi kunoketshezi lwenqubo, noma yikuphi ukuvuza kuvame ukuya kule ndawo futhi kude nokukhululwa kwangaphandle.
Ukucushwa kuvumela ukugadwa kwesimo soketshezi oluvimbelayo, olubalulekile ngezinjongo zokunakekelwa nokuqinisekisa ukwethembeka ngokuhamba kwesikhathi. Njengoba izindlela zokuvuza ezingase zibe khona zibheke ngaphandle (uhlangothi lomkhathi) noma ngaphakathi (uhlangothi lwenqubo), kuye ngokwehluka kwengcindezi, opharetha bangakwazi ukubona ukuvuza kalula kakhulu kunokunye ukulungiselelwa kwezimpawu.
Enye inzuzo ihlobene nokuphila kokugqoka; lezi zinhlobo zezimpawu zivame ukubonisa ukuphila okunwetshiwe ngenxa yokuthi noma yiziphi izinhlayiya ezikhona oketshezini lwenqubo zinomthelela omncane olimazayo endaweni evalayo ngenxa yokuma kwazo okuhlobene futhi ngenxa yokuthi zisebenza ngaphansi kwezimo ezinzima kakhulu ngenxa yokuba khona koketshezi oluyisilondolozi.
3.Tandem Double Mechanical Seals
I-Tandem, noma izigxivizo zomshini ezimbili ezibheke emuva, ziyizigxivizo zokuvala lapho izigxivizo ezimbili zemishini zihlelwa ngochungechunge. Lolu hlelo luhlinzeka ngezinga eliphakeme lokuthembeka kanye nokuqukatha uma kuqhathaniswa nezimpawu zodwa. Uphawu oluyinhloko lutholakala eduze kakhulu nomkhiqizo ovalwayo, lusebenza njengesithiyo esiyinhloko ngokumelene nokuvuza. Uphawu lwesibili lubekwa ngemva kophawu lokuqala futhi lusebenza njengesivikelo esengeziwe.
Uphawu ngalunye ngaphakathi kohlelo lwe-tandem lusebenza ngokuzimela; lokhu kuqinisekisa ukuthi uma kukhona ukwehluleka kophawu lokuqala, uphawu lwesibili luqukethe uketshezi. Izigxivizo ze-Tandem zivame ukufaka uketshezi lwe-buffer ngokucindezelwa okuphansi kunoketshezi lwenqubo phakathi kwazo zombili izimpawu. Lolu ketshezi lwe-buffer lusebenza kokubili njengesithambiso nesipholile, esinciphisa ukushisa futhi siguge ebusweni bophawu.
Ukugcina ukusebenza kahle kwe-tandem double mechanical seal, kubalulekile ukuthi ube nezinhlelo zokusekela ezifanele ukuze ulawule indawo ezungezile. Umthombo wangaphandle ulawula izinga lokushisa nomfutho we-buffer fluid, kuyilapho amasistimu okuqapha alandelela ukusebenza kophawu ukuze axazulule kusengaphambili noma yiziphi izinkinga.
Ukucushwa kwe-tandem kuthuthukisa ukuphepha kokusebenza ngokunikeza ukunganaki okwengeziwe futhi kunciphise izingozi ezihlobene noketshezi oluyingozi noma olunobuthi. Ngokuba nekhophi yasenqolobaneni enokwethenjelwa uma kwenzeka kuhluleka uphawu lokuqala, izigxivizo ezisebenza kabili ezisebenza ngokuzikhandla zisebenza ngempumelelo ezicelweni ezifunayo, ziqinisekisa ukuchitheka okuncane nokuhambisana nezindinganiso eziqinile zemvelo.
Umehluko Phakathi Kwezisi Zomshini Ezizodwa Nezikabili
Umehluko phakathi kwezigxivizo zomshini owodwa kanye nezimbili uwukucatshangelwa okubalulekile enqubweni yokukhetha yezinhlelo zokusebenza ezihlukene zezimboni. Izigxivizo zemishini eyodwa zihlanganisa izindawo ezimbili eziyisicaba ezishelelayo ezibhekene, enye inamathele ku-casing yesisetshenziswa kanti enye inamathele ku-shaft ejikelezayo, ngefilimu ewuketshezi ehlinzeka ngokuthambisa. Lezi zinhlobo zama-seal ngokuvamile zisetshenziswa ezinhlelweni lapho kukhona ukukhathazeka okuncane ngokuvuza noma lapho ukuphatha amanani aphakathi nendawo okuvuza koketshezi okulawulwayo.
Ngokuphambene, izigxivizo ezisebenza kabili ezisebenza ngomshini zenziwe ngamapheya ezimpawu ezimbili asebenza ngokuhambisana, anikeza izinga elingeziwe lokuvikela ekuvuzeni. Idizayini ihlanganisa ukuhlanganiswa kophawu lwangaphakathi nangaphandle: uphawu lwangaphakathi lugcina umkhiqizo ngaphakathi kwephampu noma i-mixer kuyilapho uphawu lwangaphandle luvimbela ukungcola kwangaphandle ukuthi kungangeni futhi luqukethe nanoma yiluphi uketshezi olungase luphume uphawu lokuqala. Izigxivizo ezisebenza kabili ezisebenza ngomshini zithandwa ezimweni ezibhekene nemidiya eyingozi, enobuthi, umfutho ophezulu, noma oyinyumba ngoba zinikeza ukwethembeka nokuphepha okukhulu ngokunciphisa ubungozi bokungcoliswa kwemvelo nokuchayeka.
Isici esibalulekile okufanele siqashelwe ukuthi izigxivizo ezisebenza kabili ezisebenza ngomshini zidinga isistimu yokweseka eyinkimbinkimbi, okuhlanganisa i-buffer noma i-barrier fluid system. Lokhu kusetha kusiza ukugcina ukuhluka kwengcindezi kuzo zonke izingxenye ezihlukahlukene zophawu futhi kunikeza ukupholisa noma ukushisisa njengoba kudingeka kuye ngezimo zenqubo.
Ekuphetheni
Sengiphetha, isinqumo phakathi kwezigxivizo zomshini owodwa kanye nezimbili sibalulekile esincike ezintweni ezimbalwa ezihlanganisa uhlobo loketshezi oluvalwayo, ukucatshangelwa kwemvelo, kanye nezidingo zokunakekelwa. Ama-seal angawodwa ngokuvamile abiza izindleko futhi kulula ukuwanakekela, kuyilapho ama-double seal anikeza ukuvikeleka okuthuthukisiwe kukho kokubili abasebenzi nendawo ezungezile lapho uphatha imidiya eyingozi noma enolaka.
Isikhathi sokuthumela: Jan-18-2024